Roll-calender.



c. SCHURMANN.

ROLL CALENDEH.

APPLICATION FILED MAR-25. 916.

Patented m. 26,191&.

2 SHEETSQSHEET 1.

c. SCHURMANN.

ROLL CALENDER.

APPLICATION FILED MAR-2,5. 191s.

mwmm Patented. Feb. 26,1918.

2 SHEETS-SHEET 2.

moo

w i ix) Milt... i

T6 @122 whom it may concern Be it known that ll CARL Sentient/min e citizen of the Empire of Germany, end it resident of 52 7 li inkelsi'elderstresse, Dusseldorf, Germany engineer, have inventedcen tain new and useful improvements in liioil' Celenders, of which the following is e steteinent.

With the hitherto known. roll celendeis for paper woven fabrics and similar hooterials, in which the reeling attachment is driven from the one celendenroll or from its countershaft, the drawback has been ob served that during the celende og of the paper" web the reeling attachment treqlnently works at an uneven tension, es the customary regulation of the letter is performed by hand and therefore depends entirely on the attention and the skill of the attendant. Both the vnreeling brake and the reeling drive not on the shaft of the reeling paper roll; the brake moment IIILISi', therefore he reduced with the reduction of the diameter of the paper roll and the driving moment must he increased with the increasing di meter of the roll. if the tension in the l remain uniform during th entii'e roll.

The present invention, new, relates to s roll calender, in which these drew/heels; sire obviated, hes-e owing to the in l method oi: driving the re ling attachment th ten-- sion in the fijfl'fi F The present so; therein that the supporting rolls for the per roll heii'ig reeled are "liven by 11 cal den roll driven by eiren'rnfe entiei. friction. In consequence thereof on. automatic reg-ole tion of the tension in the web corresponding to the quality of'the materiel is obtained by utilization oi the brake ct of the telendee rolls. By the pulling tones of the Peeling attachment remaining oi' itorizn also the itoir'ce web.

In the eocoinpsnyl oelendeic. 1s shown in tion, in Fig. 2 in front elevation. a plan oi: pert of the calender.

The unreelmp; leper roll it presses against a brake dine in, which. is rotated in? the unreehng popes web. if es paper weh then. travels in known mennei" through the lFotent-ed lFehQ2h. i918 Serial Ito. 86,556.

reeling at eehment consists of one or two supporting rolls 27 and. i journsled next each other, on which the paper weh-i'e-reels as-roll R tin shaft of one or the shaftswfof hoth tolls i end 71 respectively are fitted helt-pnlleys over which runs at belt 8. When two siiippoi'ting rolls are employed the two nilleys m and n are of a conical shape and disposed in opi iosito sense on their rolls. l'lie belt 8 may then be shifted on the pulle'ys m, n so that varying" speeds may he im ported to the rolls 2 'lhe rolls '5. i are driven by means of helting" from one of themelender rolls. As during the reeling oi the paper web that tensioii will come into effect which is imparted to the said web by the difi'erent speeds of the two snpiiiorting rolls 5 and a tension iii the paper is obtained which will remain uni form wiring the reeling, as always the some foree will not on the same leverage. l his method of reeling the pap-er web has the further advantage, that at a constant speed of the supporting rolls 2, i the paper web will he reeled at o constsm power consumption. In. consequence thereof a. constant :torce n ill. prevail also at the periphery of the driving pulley on the calender roll, so that nny eat-lender roll driven by circumferential tiriction may he used for driving lin nttachment- This possibility of the i'lriving ll allows 21 wide le ting the frictional efi'ect in The difference between the oitcumferen tiel speed of the two supporting rolls 9?, i and with it the additional tension in the paper web between the two supporting rolls which is necessary for a. close reeling, may veried according to the strength of the respective peper under tretmentf lit therefore the pulley driving the reeling at, teehinent is not fitted, as it was hithei'to enstoineiy. on the driving lOll o 01' on its eonnt'eirsheit but on the extended trunnion of another roll. Z dniven by circumferential trietion only, the friction between the driving roll o and the roll 5 favorable for the eelendeiing is regulated in correspond ence with'the power required by the reeling ettsehmenh in other words; papers with high tensile strength ate reeled tighter and therefore eelendered at a higher friction between the rolls a and Z: than papers of o lessen strength. 'llhe reeling attachment llll thus aflords besides the absolutely uniform tension during the calendering of the paper ;We-b, the further advantage of an automatic regulation of the friction in the calender.

The belt 9 may also drive the conical pulleys m, n directly Without any second belt. In this case only guide rolls are required.

. In place of the one brake drum h also several such drums may be provided, between which the paper web travels. For securing that the drive of the rolls, and in particular of that roll Which serves to drive the supv porting rolls for the Web to be reeled, is effected by the peripheral friction in a proper manner, it is necessary to provide that there is no excessive friction of the 10111112115 in the hearings. 1 Therefore no split bearings but only closed bearings and bushes of one solid piece have been employed in the bearings for the rolls shown, the said sleeves, bushes and bearings being made so strong that they cannot sag. The bushes are cylindrical and are supported in the middle of their cylindrical surface by means of a trans versely extending web provided in the hearing housing so as to oscillate thereon and adapt themselves in case the trunnions of the rolls should assume an inclined position When the roll' might bend. As the closed a bush-bearings form one solid piece, and if of suflicient thickness, afford a sulficient strength they will not bend, as it might occur with split bearings. In consequence thereof the pressure of the' journals is 11I11- formly distributed over the whole surface of the bush and there will be no uneven strain on the bearing surface and no catching of the journals, as will occur in other cases.

I claim:

1. Roll calender for paper, woven fabrics and similar materials, comprising supporting rolls for the web to be reeled, said supporting rolls being driven from one of the contain a bush made in a tubular piece and oscillatingly supported on their cylindrical surface by a web of the pressure member extending transversely to said surface.

CARL SCHURMANN.

Witnesses:

ALBERT F. Norm, HELEN NUFER. 

